Long-Term Estimation of Soil Heat Flux Using Single Layer Time Series Data of Soil Temperature
Abstract
Soil heat flux may play an important role in surface energy balance. In this study, we examined the performances of two methods for predicting soil heat flux from single layer time series data of soil temperature. The first one is the traditional method, which an analytical solution of soil heat flux can be obtained by assuming the surface soil temperature varies sinusoidally. The second one is the connection between surface soil temperature and soil heat flux derived by half-order time derivative/integral, and is based on a simple model of heat transfer described by a one-dimensional diffusion equation with a constant heat diffusivity. Good agreements between measured and predicted soil heat fluxes were found for both methods. However, it was shown that the half-order derivative method has a better capability to capture flux accuracy and trend than the traditional method for long-term soil heat flux estimation. Keywords: soil heat flux, half-order derivative method, soil temperature
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2007
- Bibcode:
- 2007AGUFM.H33C1446H
- Keywords:
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- 1818 Evapotranspiration;
- 1830 Groundwater/surface water interaction;
- 1840 Hydrometeorology;
- 1843 Land/atmosphere interactions (1218;
- 1631;
- 3322);
- 1878 Water/energy interactions (0495)